Jack.



PATBNTED MAY 17, 1904.

J. R. ARMSTRONG.

JACK. APPLICATION FILED 00121, 1903.

N0 MODEL.

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msnbnms PETERS on. PHoYp-uwd, wAsummo UNITED STATES Patented May 1'7,1904.

PATENT OFFICE.

JOHN ROBERT ARMSTRONG, OF BESSEMER, ALABAMA, ASSIG-NOR OF ONE- I HALF TOL. O. MEIGS, OF BESSEMER, ALABAMA.

JACK,

SPECIFICATION forming part of Letters Patent No. 760,368, dated May 17,1904.

Application filed October 21 1903- To all whom it may concern:

Be it known that 1, JOHN ROBERT ARM- STRONG, a citizen of the UnitedStates, residing at Bessemer, in the county of J efierson and State ofAlabama, have invented new and useful Improvements in Jacks, of whichthe following is a specification.

My invention relates to new and useful improvements in jacks for lightcarriages, wagons, and other similar vehicles; and its object is toprovide a jack of simple, durable, and inexpensive construction, whichis formed of few parts and which can be readily operated to hoist andsupport a vehicle.

The invention consists in providing a standard in which is pivoted alever having a toothed bar pivotally connected thereto and slidablymounted within the standard. The teeth upon this bar are held normallyin engagement with a locking-pin by means of a spring, which isconnected to the standard and bar, respectively. Means are providedwhereby the toothed bar can be readily disengaged from the locking-pin.

The invention also consists in the further novel construction andcombination of parts, hereinafter more fully described and claimed, andillustrated in the accompanying drawings, showing the preferred form ofmy invention, and in which-- Figure 1 is a perspective view of the jack,and Fig. 2 is a vertical section therethrough.

Referring to the figures by numerals of reference, 1 is a base fromwhich extends parallel standards 2, connected at their upper ends by apivot-pin 3, on which is fulcrumed a lever 4, having a recess 5 in itsupper face for the reception of axles of vehicles to be raised. Pivotedto one end of this lever are angle-irons 6, which are arranged atopposite sides of the lever and are connected to a toothed bar 7, theteethS of which are adapted. to engage a locking-pin 9, which connectsthe standards 2. A connecting-bolt 10 is secured within the standards ata point between the pins 3 and 9 and has a roller 11 journaled there-Serial No. 177,930. (No model.)

on. A spring 12 is connected at opposite ends to the lower end of thebeam 7 and to the base 1, respectively, and a cord .13 or other flexiblestrip is fastened at opposite ends to the bar 7 and the lever.

In using the device the cord 13 is drawn backward, so as to expand thespring 12 and move bar 7 out of engagement with pin 9. The lever A canthen be adjusted to any desired angle, and as soon as it assumes itsproper position the cord 13 is released and the spring 12 will promptlythrow the bar 7 upon pin 9 and bring one of its teeth into engagementwith said pin. The roller 11 is provided so as to prevent undue wearupon the bar 7 when the same is moved. backward and forward in raisedposition between the standards.

In the foregoing description I have shown the preferred form of myinvention; but I do not limit myself thereto, as I am aware thatmodifications may be made therein without departing from the spirit orsacrificing any of the advantages thereof, and I therefore reserve theright to make such changes as fairly fall Within the scope of myinvention.

Having thus described the invention, what is claimed as new is- In adevice of the character described, the combination with a base havingstandards thereon, and a roller journaled between the standards; of alever fulcrumed between the standards and above the roller, a toothedbar pivoted to the lever and slidably mounted between the standards, alocking-pin connecting the standards and normally supporting and engagedby the bar, a spring secured at opposite ends of the bar and base,respectively, and a flexible connection between the bar and the lever.

In testimony whereof I aflix my signature in presence of two witnesses.

Witnesses:

I. S. WEST, L. B. LANIEL.

